<v:LoginViewModel Login="Admin" Password="@dm1n"
    xmlns="http://schemas.microsoft.com/client/2007"
    xmlns:s="clr-namespace:System;assembly=mscorlib"
    xmlns:v="clr-namespace:VS.MainModule.Views">

    <v:LoginViewModel.Errors>
        <s:Exception Message="Test" />
    </v:LoginViewModel.Errors>

</v:LoginViewModel>
        
        